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#341000 - 03/07/11 01:30 AM Re: Thoughts on integrating a different into the mix [Re: Ken.C]
ClubNeon Offline
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It's a nine dimensional box. smile
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#341081 - 03/07/11 08:04 PM Re: Thoughts on integrating a different into the mix [Re: Ken.C]
demetman Offline
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Loc: NJ
Originally Posted By: kcarlile
OK, I gotta ask... cf^3? I keep reading it as cubic foot to the third power, which doesn't make sense.

To be honest I'm not quite shore what ^3 means in regards to enclosure formulas in cf. That is how the owner of Steroe Integrity has presented the recommended enclosure size. When you look at adavaced enclosure design software, the formulas for calculating optimum speaker enclosures from small/theil parameters, is a series of complicated mathematical equations. This type of math is not my strong point. If anybody out their has experience in advanced enclosure design, please give your .2.
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#341082 - 03/07/11 08:04 PM Re: Thoughts on integrating a different into the mix [Re: demetman]
Ken.C Offline
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I suspect that it is, in fact, a mistake.
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#341100 - 03/07/11 09:33 PM Re: Thoughts on integrating a different into the mix [Re: Ken.C]
audiosavant Offline
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I say just put some Axiom M80's in your car and be done with it! grin
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#341104 - 03/07/11 09:51 PM Re: Thoughts on integrating a different into the mix [Re: demetman]
JohnK Offline
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Demetrios, yes both the T/S parameter Vas and enclosure volume Vb are given simply in cu.ft., not cu.ft. cubed. You've probably seen the formula for calculating the resonant frequency of a driver with a free-air resonance Fs and an "equivalent volume" Vas in a closed box of a certain internal volume. Apparently here a small closed box with a internal volume of 3 cu. ft. is being proposed(about 49Hz).
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#341146 - 03/08/11 01:34 AM Re: Thoughts on integrating a different into the mix [Re: JohnK]
demetman Offline
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Loc: NJ
Thank you for your informative responce JohnK. Nothing ventured, nothing gained. I will be fabricating a 3.5cf ported enclosure tuned to 30Hz for the 15" Stereo Integrity subwoofer. I am able to borrow an amp from a buddy that's a sound teck for dance clubs and concert halls. I'd like to see if I can get the Ep5oo and the SI to blend well while playing full range. I'm sure it will be challanging and possibley yeild good results. Expect some build progress pictures to show up in the course of a couple weeks. I'll be checking back once I get the ball rolling. Thanks for any ideas
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#341256 - 03/08/11 08:31 PM Re: Thoughts on integrating a different into the mix [Re: demetman]
jakewash Offline
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Can't wait to see some of the build as it happens. Good luck.
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#341319 - 03/08/11 11:45 PM Re: Thoughts on integrating a different into the mix [Re: jakewash]
demetman Offline
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Registered: 04/03/08
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Loc: NJ
After questioning Nick Lemons, owner of Stereo Integrity of what the meaning of ^3 in reference to a 3.5^3 enclosure is...His responce was "the ^3 is mathematical shorthand for Cf or cubic foot. "It is commonly referenced this way in speaker enclosure design".

My buddy ran some numbers for various vent and port dimentions. Waiting on a responce from the manufacturer on port dimension recommendations. So far the best looking box utelizes a 2"x12" capped vent with box dimensions of 18"Hx22"W and a depth that depends on recommended vent type. I'm hoping to get this build finished within a week, time permitting.

I need to start looking at amplication for this sub. After researching the Dayton SA 1000 sub amp, I found that the amp barely puts out half of it's rated output. Any recommendations for amps delivering around 1000w rms into a 4 ohm load with an infrasonic filter? Keep in mind this is an experiment so budget is alo a key factor. Thanks
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#341322 - 03/08/11 11:52 PM Re: Thoughts on integrating a different into the mix [Re: demetman]
ClubNeon Offline
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Registered: 02/06/09
Posts: 3466
Loc: Western Maryland, USA
The ^3 wasn't a problem. It was combining it with cf that was confusing. One should use ft^3, or cf, but not cf^3, which says "cubic feet cubed" (and why I said ninth dimensional).

The f^3 actually should be written as ft³ (&sup3;).
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Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
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#341323 - 03/08/11 11:52 PM Re: Thoughts on integrating a different into the mix [Re: demetman]
JohnK Offline
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Registered: 05/11/02
Posts: 10644
Yes, Demetrios; feet cubed is correct, but not cubic feet cubed, which is what you were originally showing.
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